doc(*): Correct PipeStream.Write method remarks (#4032)

Calling the Write method will not block current thread.

Author: fenghou1st

xml/System.IO.Pipes/PipeStream.xml

@@ -2112,7 +2112,7 @@ The pipe handle has not been set. (Did your <see cref="T:System.IO.Pipes.PipeStr
 ## Remarks  
  Use the <xref:System.IO.Pipes.PipeStream.CanWrite%2A> property to determine whether the current <xref:System.IO.Pipes.PipeStream> object supports write operations.  
   
- Calling the <xref:System.IO.Pipes.PipeStream.Write%2A> method blocks until `count` bytes are read or the end of the stream is reached. For asynchronous read operations, see <xref:System.IO.Pipes.PipeStream.BeginWrite%2A> and <xref:System.IO.Pipes.PipeStream.EndWrite%2A>.  
+ For asynchronous write operations, see <xref:System.IO.Pipes.PipeStream.BeginWrite%2A> and <xref:System.IO.Pipes.PipeStream.EndWrite%2A>.  
   
  ]]></format>
         </remarks>